Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 267 Issued at 2200Z on 24 Sep 2006

IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z

Solar activity was very low. Region 910 (S09W32)
remains the only sunspot group on the visible disk and is now
magnetic classification alpha. Both the San Vito and Sagamore Hill
radio sites reported a Type II radio sweep with very similar times
(24/1526Z - 24/1532Z) with an averaged estimated shock speed of 660
km/s. San Vito reported plage fluctuations and surging that
coincided with the Type II radio sweep. An increase in x-ray flux
was observed during this period and reached the level of an A9.3
flare. No current imagery is available to aid in determining the
possibility that a CME may be associated with this radio event.

IB. Solar Activity Forecast

Solar activity is expected to be very
low with a slight chance for an isolated C-class flare from Region
910.

IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z

The geomagnetic field was active with multiple periods of minor
storming. Solar wind speed is approximately 650 km/s due to a
coronal hole high speed stream.

IIB. Geophysical Activity Forecast

The geomagnetic field is
expected to be quiet to unsettled with occasional active periods
during the forecast period.

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